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Finding the Fourth Proportional to 121,166.28, 167,349.42 and 80,809.92

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Solution

The fourth proportional to 121,166.28, 167,349.42 and 80,809.92 is: 111,611.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,166.28 : 167,349.42 = 80,809.92 : x
  2. Step 2: Convert to fraction form
    121,166.28/167,349.42 = 80,809.92/x
  3. Step 3: Cross multiply
    121,166.28x = 167,349.42 × 80,809.92
  4. Step 4: Simplify right side
    121,166.28x = 13,523,493,242.25
  5. Step 5: Solve for x
    x = 13,523,493,242.25/121,166.28
  6. Step 6: Final answer
    x = 111,611.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.